diff --git a/docs/storage/layerwriter.go b/docs/storage/layerwriter.go index 0305d011..fe118597 100644 --- a/docs/storage/layerwriter.go +++ b/docs/storage/layerwriter.go @@ -46,16 +46,37 @@ func (lw *layerWriter) StartedAt() time.Time { // uploaded layer. The final size and checksum are validated against the // contents of the uploaded layer. The checksum should be provided in the // format :. -func (lw *layerWriter) Finish(digest digest.Digest) (distribution.Layer, error) { +func (lw *layerWriter) Finish(dgst digest.Digest) (distribution.Layer, error) { ctxu.GetLogger(lw.layerStore.repository.ctx).Debug("(*layerWriter).Finish") if err := lw.bufferedFileWriter.Close(); err != nil { return nil, err } - canonical, err := lw.validateLayer(digest) - if err != nil { + var ( + canonical digest.Digest + err error + ) + + // HACK(stevvooe): To deal with s3's lack of consistency, attempt to retry + // validation on failure. Three attempts are made, backing off 100ms each + // time. + for retries := 0; ; retries++ { + canonical, err = lw.validateLayer(dgst) + if err == nil { + break + } + + ctxu.GetLoggerWithField(lw.layerStore.repository.ctx, "retries", retries). + Errorf("error validating layer: %v", err) + + if retries < 3 { + time.Sleep(100 * time.Millisecond) + continue + } + return nil, err + } if err := lw.moveLayer(canonical); err != nil { @@ -64,7 +85,7 @@ func (lw *layerWriter) Finish(digest digest.Digest) (distribution.Layer, error) } // Link the layer blob into the repository. - if err := lw.linkLayer(canonical, digest); err != nil { + if err := lw.linkLayer(canonical, dgst); err != nil { return nil, err }